The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2002
Filed:
Jul. 29, 1999
Michael J. Regan, Corvallis, OR (US);
Marzio Leban, Corvallis, OR (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A high efficiency thermal inkjet printhead which uses a novel resistor system. The printhead includes a support structure, at least one layer of material which comprises at least one opening therethrough, and at least one ink expulsion resistor located within the printhead between the support structure and the layer of material having the opening therein. The resistor is produced from at least one metal silicon nitride composition. Numerous benefits are achieved by this development including (A) reduced resistor current consumption and greater energy efficiency; (B) increased bulk resistivity of the resistor elements compared with prior systems; (C) cooler printhead operation; (D) multiple economic benefits including the ability to use lesscostly, high voltage/low current power supplies; and (E) improved reliability, stability, and longevity levels in connection with the printhead and resistor elements.